package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    @Override
    public User wxlogin(UserLoginDTO userLoginDTO) {
        //访问微信服务获取对应的openId
        String openId = getOpenid(userLoginDTO.getCode());

        //判断是否获取了openId
        if(openId == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //判断openId对应的用户是不是新用户
        User user = userMapper.getByOpenId(openId);

        //如果是则实现自动注册
        if(user == null){
            user = User.builder()
                .createTime(LocalDateTime.now())
                .openid(openId)
                .build();
            userMapper.insert(user);
        }

        return user;
    }

    private String getOpenid(String code){
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type","authorization_code");
        String doGet = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(doGet);
        String openId = jsonObject.getString("openid");

        return openId;
    }
}
